System of control



H. H. JOHNSTON.

SYSTEM OF CONTROL Armcmon nun wurzz. ma.

1,41 6,033. Patented May 16, 1922.

INVENTOR Howard H Job/757m AT'I'ORNEY UNITED STATES PATENT OFFICE.

newsman; JOHZNS'10N,'OF EDGEWOODePARK. rENNs rL -mratnssmiqoa,Tdytnsqi INGHOUSE ELECTRIC & MANUFACTURING COMZPANY, acomom'rron orr mm- SYLV'ANIA.

' Application filed July 22,

' T0 H211 ioliom it 12mg concern provide a simple and economical 'system control for governing the operationof an electric vcliicle'either from a cab mounted thereon orfrom a l-emote point.

Another object of my invention is to provide a system otcontrol of. the above-indicate'd type that shall he provided with control apparatus mounted on the electric vehicle for controlling its operation in a forward and in a reverse (median and with auxiliary control apparatus comprising a single control conductor for effecting control of the vehicle from a remote point.

A further object of my invention is to provide :1 system of control of the aboveindicated character that shall. haven relay mounted on the electric vehicle. means mounted on the vehicle and interlocked with the relay for governing. the operation of the vehicle in a forward and in a reverse direction and a. single control. conductor associated'with the relay for effecting. operation of the vehicle ina forward and in a reverse direction from a remote point.

In many industries using-electric locomotives as, for example; the coke industry, it is often desirable not only to operate locomotives from the cabsmounted on them but also to operate the locomotives from remote points. Thus, in charging coal into and drawing coke from coke ovens it is very desirable that the locomotives and the cars attached thereto be controlled from a tower located some distance from the heat of the ovens. However, as the locomotives are not always operated in proximity to the hot. ovens it; is also desirable to provide the locomotives with means for controlling their operation from the cabs mounted on them.

in the accompanying drawing, Fig. l is a diagrammatic View of a control system constructed in accordance with my invention: Fig. 2 is a chart illustrating the sequence SYSTEM or coN'rBIoL.

Specification of Letters Patent. Fafientd 19181 Serial mammal I or operation of thswitdhesjshdwn ;i'n rigir; Fig. 3 is a "partial view of at imam-cove; Figs: 4 nkle-are eatendiagrammatic views of cettainswitches that?" are employed in-fily of a reversingdevice f 'fa'mitiar form tlitfi i eiiipluyeq -in conne'ti 'n! wirmm'y invention. 2 Referring-to tlie' driitt'l llgfa lbcofr'iotiv l is provided vtith tii o mpenii'igm tersMr and lll2," respectiveiy, eaving immatures-"2 and sygma fieid wiridingsie trims-titer are a'dapteclto be eanj ena) twepbwrrans e and"? by means of currfetiflcollectorst under A pl iay er switchesllsl, LS2, sgor aha G2 are rovided for 'govei-nrng the?eiteaiii' connections of the motors Ml lmtI'MQ'and a plurality of switches 11 tbfltiflfiriclusitfar provided for excludingre'sist ors "Rl td'RXi', inclti'sive,"trom the circuit-of the dtlring acceleration. The"motors' arhlso rdf a limit switch-Irma an evefloea'swiseh 011 A" master controllerfMC 65 tve'rntng" the operation of the lodomotiye frorn"t'lie"cah thereof is provided with a movatil e conta'c't! segment" 1'7 which is adahttl to engage contact' tingers'ds to 26,: inclhslve; when 'tl'i'e controller is' moved through positions we Z, ii'icliisive'. 'A re-lay 27; which jiS iii'terlocked with a "master reverse'r MB, is' adapted or bridge cont-act fi ngers'28 when imsn-leesed position and to bridge Contact firigensee when in an enrgizhd'positibn. The re'l'ay27 controlsthe nergizetion oftli'e coils f and T which effect-'thecperation oftliwfeversingswitch BS? The reversing switchfis' pro:

vide'd with two interlock switches 30 and 31; which are respectively operative'when the reversing switch is in'a reverse and'inLa'tor ward position, for connecting theunastet controller'toone ofthe power rai'ls'6 and The master reverser MR embodies a coiitabt segment 32 which is adapted to bridge c'o'ntact fingers 33 and S t-when theimaster reverser is moved to the reverse position, and a contact segment 35 which'is adaptedto bridge contact fingers 33 and 36when the reverser is in the forward position; The 10- comotive is also provided with a switch 37 which is closed when operation is efiected from the cal.) and a switch 38 which is closed when the locomotive 'is operated from a re mote point. i

Brake coils 4-0, that may be operated either from the cab or from a remote point, me

is closed, the master reverser provided for effecting a release of the vehicle brakes." The line switch LS1 is provided," in a well known manner, with two interlock switches LSl-in, as indicated in Fig. 4, which are respectively inserted in the circuit of the coils of the switches G2 and llr The s'witch G2 is provided with an interlock switch GQ-in which is inserted in circuit with the coil of the switch S, and-the switchS is provided with interlockIswitch=which is inserted in the circuit of the coil for the line switch L32. An interlock switch {11, which is mounted on the 1' master cont-roller. MC, is provided fOrbridging the contact fingers 20 and 21 in the ofl? position ,of the. controller in order to permit operation of certain of the switches from a remote point. The switches 11, 12 and ,13 =.a re,pmvided withinterlockswitches 42 to 46, inclusive, as indicated in Fig. 5 for automaticallyexcluding resistois R1 to R3. inclusive, from the circuit of the motors in is. customary and well-known manner. ,The

are designated in a manner to indicatethe position of the associated switch when the interlock switch is in a closed position.

A master switchMS, .which 'is located at a remote point, is provided for selectively impressing positive or negative current from a supply circuit 50'upon a control c0nductor-51. The master switch MS embodies a. contact segment 52 which is adapted to bridge contact fingers-53 and 54 for impressing positive current upon the control conductor 51 'when the master switch is moved to the forward position and. a contact segment 55 which is adapted. to bridge contact fingers 54 and 56 for impressing negative current upon the control conductor 51 when the master switch is moved to the reverse position. The master switch MS, in a manner hereinafter set forth, effects the operation of the locoootive 1 in a forward direction when moved to the forward position and effects operation of the locomotive in a reverse direction when moved to the reverse position. The control apparatus on the locomotive 1 is connected to the control conductor 51 by means of a current collector 57.

When it-is desired to operate the locoinitive locally from the cab, the switch 37 is positioned according to the direction of movement of the locomotive that is desired. and the acceleration of the motors is controlled by means of the master controller M1. in case it is desired to control the locomotive from a remote point, either in a forward or in a reverse direction, the switch 37 is opened the switch 38 is closed and the mas ter switch MS. which is located at any remote point. is moved to its forward or to its verse operation, the relay is energized to bridge the contact members 29.

, Assuming the switch 37 to be closedand themaste'r reverser MR to be moved to its forward position, the operation of the system by means of the master controller MC is as follows.

When the master controller is moved from the off position to the coasting position, a circuit is completed from the positive power rail 6 through the current collector 8, contact fingers 33 and 36 of the master revcrser,. w l 1ich are bridged by contact segment 35, switch 37, brake coils 40. contact fingers 18 and 19 of the master controller, which bridged by the contact segment 1,7, overload trip switch, interlock switch 3 1 ,of the reversing; switch, which is closed when the master reverser is in a forward position, and the current collector 9 to the negative power rail 7. The brakes of the locomotive are now released to permit the acceleration of the locomotive in a forward direction.

In positions (1,5, 0 and d of the master controller, the contact fingers 20 and 21 of the master controller are bridged by the contact segment 17 in order to complete cir cuits through the energizing coils of the switches S, LS1, G2, 11, 12 and 13. The circuit completed through the coil of the switch LS1 may be traced from the positive supply mill]. through the current collector 8, con tact fingers 33 and 36, which are bridged by the con tact segment 35, switch 37, coil of the switch LS1, contact fingers 21 and 18, which are bridged by the contact segment 17 of the master controller MC, overload switch OL, interlock switch 31 of the reversing switch and the current collector 9 to the negative power rail 7. Theswitch LS1 is operated and the two interlock switches LSl-in complete circuits through the coil of the switch G2 and the coil of the switch 11. The circuit through the coil of the switch 11 may be traced from the positive supply rail 6 through the current collector 3, contact fingers 36 and 33. which are bridged by the contact segment 35, switch 37, interlock switch LSl-in, limit switch L, interlock switch 42 in the open or out po sition of switch 11, coil of the switch 11. contact fingers '21 and 18. which are bridged by the contact segment 17, overload switch ()li, interlock switch 31, and the current collector 9 to the negative supply rail 7. The coil of the SWitrli G2 is connected in par- :illcl to the coil of the switch LS1 in the cir cult above traced for the coil of line switch reverse position according to the direction lSl. \Vhcn the switch G2 is closed, the in- 1:10

terlock switch G2 in completes a circuit through the energizing coil of the switch S. The operation of'theswit-ches LS1, G2 and'sf completes a circuit through the propelling motors which is traced from the positive supply rail G through current collcto1- 8,'line switch'LSl, resistors R1; R3 and R5. notor'iMl, switch S, resistors R2, R4 and '36, motor M2, coil of the limit switch L', switch G2, coil of the overlo i switch and the currentcollector 9 to the negative supply conductor 7. The motors Mland M2 are operated in series-circuit relation and the switches 11, 12 and 13 are successively operated by means of the limit switch L, in a well-known manner, to sue cessivelyshort circuitthe resistors R1, R2 and R3 from the circuit of the motors. The energizing circuit for the coil of the switch 11 is completed through the interlock switch 42 and" the "limit switch Land, wheirthe switch '11 is operated, a holdingrircuit therefor is established through the interlock switch 42 independent of the limit switch "Z; After the operation of the switch 11; an energizing circuit, under the control of the limit switch L, is established for the coil of the switch 12 through the in terlock switches 44; and' iilg'which respec tively correspond to the open and the closed positions-ofswitches 12 and'll. The inter locl; switches 4:4 am 46, which are associated with 'the "switches 12 and 13, successively serve to establish energiiing and holding cii'c'uits'foi-"the switches 12 and 13.

When the mastericontroller MC is successively inoved through the positions 6, f and"g,the switches 14, 15 and 16 are successively operated for Short-circuiting the resistors R4, R5 and R6 from the circuits of the motors.

Between positions 9 and h of the master controller, is a transition position during which the switch S is released and the switches (i1 and LS2 are operated to connc/ct the motors in parallel-circuit relation The contact segment 17 of the master controller also disengages contact fingers "ll. 25 and 26 to insert the resistors R4, R5 and R6 in the circuit of the motors, In positions i, is and Z of the master controller, the resistors R4 R5 and R6 are successively excluded from the circuits of the inoiors.

In case it is desired to operative the locomotive in a reverse direction by means of the master controller MC, then the master reverser MR is moved to the reverse position and a circuit is completed through the energizing coil of the relay 527 which is traced from the positive supply rail 6 through the current collector 8, coil of the relay 2?. switch 37, contact fingers 33 and 3 1. which are bridged by the Contact segment 32 of the master ieverscr MR and the current collector 9 to the negative supply conductor 7.

When therelay 27 is operated, a circuit is completed froin' the positive supply rail 6 thronghthecurrent collector 8, switch 27, reversing coil 1" of the reversing switch and the current collector 9 to the negative su ply rail 7. p The reversingswitch BS is 1 bus operated, and-the locomotive is placed in condition for operation in a reverse'dired a r a-, "ij' 'w f ="il he'operation l ofthe master I controller througlrits successive positions is similarto th at set' lorthin discussing the forwardiop erafiion of the locomotive, and. a de-tailed tracing: ofthe circuits completed is deemed unneoessaryu 1 1 Assumingthe irolay 2'? to be in=a released position; thQlUaSlZBI controller MC to be in the-ofl" posi tioi1,; the switch 37 to be open and the switclr 38% be closed, then the locomotive may beloperatedin a forward 01' in a reverse'=dir'ection by means'of themaster switch M'S irhieh is located at a point remote'zirourithe'locomo-tive. filnnease 'it is desired -to operate the locomotive in a reverse direction, the master sW-itcmMSiS moved to the reverse position aod'a circuit is completed from the negative conductor oii'the isupply. circuit I 50 through the 'contact fingers :55 and I 56; which are bridged by theeontactisegment 55, control conductor 5 1, current collector 51,:(30ll-uf the a'elayflfi' -iind current collector 8 to the positive supply railr-fi w-hich is connected to theisuipplycircujt 50 by means of aswitch 601'tThus the'relay27; is operated-to com- 00 pleteaic'meuit from the positive supply rail 6 thsough .the current collector 8, relay 2'7, reversing coil 1', and the current collector 9 to the negative supplyirail 7 in order to prepare thelocomotive for operation ina reverse, direction.

WWhca-the relay 2? is operated, circuits arealso completed through the brake-release coilsiaiOirantt-coiils oi the switchesLSl, G2,

9, 11, i2 and 13. The circuit through the brake release coils 4.0 is traced from the control conductor 51 which is energized by negative current through the current collector 5T. coils 40, switch 38, overload switch OL, interlock switch 30, which has been operated 5 by the reversing coil 0*, and the current collector B to the positive supply rail 61 The ircuit for the coil of the line switch LS1 is traced from the control conductor 51 through the current collector 57, coil of the line switch LS1. switch overload switch l). interlock switch 30 and the current collector 8 to the positive supply rail 6. The switches 2 and are successively operated h meuns ol' the interlock switches LSl-in and 2in to connect the motors in series circuit relation. and the switches ll, 12 and 13 are su cessively and automatically operated to short circuit the resistors R1 R2 and R3. g

c When the locomotive is operated by the switch MS, a very limited speed or the locomotive 'is desired and, accordingly, the resistors R4, R5 andRG are maintained in the motor circuitiandno parallel connection of the motors is. efl'ected. L In case it, isrdesired to operate the locomotive in a forwarddirection by means of the master switch MS, the master switchis moved toits forward position, and positive current ;is supplied to the control conductor 51v from zthe supplyl circuit 50, through the contact fingers 53 and54, which are bridged by the contact segment 52. When the con trol conductor 51 is supplied withpositive current, the relay 27 is released, inasmuch as both terminals. of the energizing thereof'are connected to positive sources of current. Upon the release of therelay'2l', a circuit=is completed from the positive supply rail 6, through current collector 8, -coil f for the reversing switch,-relay 27, which bridges the contact fingers 28,=and the cur rent collector- 9 to the fineg'ative supply rail7. 1' "m a H After the reversing switch RS has been moved-to its -forward position, the switches LS1, G2, S, 11, 12 and l31and the brake coils 4:0 are'operated,-in a manner similar to that set forth'in discumin the reverse operation of the locomotive,. y means of the masterswitch'MSmnd a detailed discussion-thereof is considered to be unnecessary. Modifications in the system, arrangement and location of parts may be made within the spiritl and scope of my invention, and such modifications are'intended to be covered by the appended claims.

I claim as my invention: 1. In a system' of vehicle control, th combination with a motor mounted on said vehicle, of means for operating said motor in a forward or a reverse direction from a point on the vehicle, means comprising a single conductor for operating asid motor from a point external to the vehicle, and switching means for permitting the one or the other type of operation in accordance withthe position of said switching means; 7 2. In a system of vehicle control, the combination vvith a driving motor for the vehicle,-of a relay, means interlocked with said relay for-governing the operation of saidlmotor in a f orward .ora reverse direction from a point on the vehicle, means comprising .va 4 single auziiliary-control-circmt conductor-tor,controlling the relay to efi'ect forwarder reverse operation of said motor from a point external to the vehicle, and a plurality of switches forres ectively permitting thepnepr the other ype of operation in accordancegwith the closure of the renxe p nd r ksw e a 3. Inasystemoli vehicle control, the combination withamotofi mounted on said vehicle, otmeans for operating said motor from a point on the vehicle, means for operating said motor, from a point external to the vehicle, and independent switching means for permitting the oneaor the other type ,of ;operation inv accordancewith the position :of said switchin t means.

i 4. .In a system of vehic e control, the com bination with adriving motor for the vehicle, of ,a relay, means interlocked with said relayiforigoverningz the operation of said motor from a points on the vehicle, means ;for controlling ,the ,relay to effect operation of said m oto'rr from a point external to the vehicle, and aplurality of switches for, respectively permitting'the one or the other type of operationin accordance with the closure of the corresponding switch.

In testimony whereof, I have hereunto subscribed my name this 13th day of July, 1918.

HOWARD H. JOHNSTON. 

